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ivshmem: error on too many eventfd received

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The number of eventfd that can be handled per peer is limited by the
number of vectors. Return an error when receiving too many of them.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Marc-André Lureau 2015-06-23 14:07:11 +02:00
parent f456179fae
commit 1ee57de444
1 changed files with 7 additions and 0 deletions
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7
hw/misc/ivshmem.c
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@ -571,6 +571,13 @@ static void ivshmem_read(void *opaque, const uint8_t *buf, int size)
/* each peer has an associated array of eventfds, and we keep
* track of how many eventfds received so far */
/* get a new eventfd: */
if (peer->nb_eventfds >= s->vectors) {
error_report("Too many eventfd received, device has %d vectors",
s->vectors);
close(incoming_fd);
return;
}
new_eventfd = peer->nb_eventfds++;
/* this is an eventfd for a particular peer VM */